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EC number: 479-880-7 | CAS number: 97042-18-7
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
Genetic toxicity: in vivo
Administrative data
- Endpoint:
- in vivo mammalian somatic cell study: cytogenicity / erythrocyte micronucleus
- Remarks:
- Type of genotoxicity: chromosome aberration
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 17 January to 28 February 2005
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP study conducted in accordance with international guideline
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 011
- Report date:
- 2011
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 474 (Mammalian Erythrocyte Micronucleus Test)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of assay:
- micronucleus assay
Test material
- Reference substance name:
- BPS-MAE
- IUPAC Name:
- BPS-MAE
- Details on test material:
- - Description: white powder
- Analytical purity: 99.2%
- Lot/batch No.: G140421
- Expiration date of the lot/batch: May 2005
Constituent 1
Test animals
- Species:
- mouse
- Strain:
- CD-1
- Sex:
- male
- Details on test animals or test system and environmental conditions:
- TEST ANIMALS
- Source: a well established supplier
- Weight at study initiation: (P) Males: 29-40 g
- Diet: free access to standard rodent diet
- Water: free access to potable water taken from the public supply
- Acclimation period: minimum of 5 days
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 19 to 25°C
- Humidity (%): 40 to 70%
- Photoperiod (hrs dark / hrs light): 12/12
IN-LIFE DATES: From: 17 January 2005 to 28 February 2005
Administration / exposure
- Route of administration:
- oral: gavage
- Vehicle:
- - Vehicle used: carboxymethyl cellulose (CMC)
- Justification for use and choice of vehicle: not reported
- Concentration of test material in vehicle: 25, 50, 100 mg/ml
- Amount of vehicle (if gavage): 20mL/kg/day
- Lot/batch no. (if required): 012K0060
- Purity: 0.5% w/v carboxymethylcellulose - Details on exposure:
- PREPARATION OF DOSING SOLUTIONS:
DIET PREPARATION
- Rate of preparation of diet (frequency): on each day of dosing - Duration of treatment / exposure:
- 48h
- Frequency of treatment:
- All animals were dosed once on Day 1 and on Day 3
Doses / concentrations
- Remarks:
- Doses / Concentrations:
0, 500, 1000, 2000 mg/kg/day
Basis:
actual ingested
- No. of animals per sex per dose:
- 7 male mice except for positive control (5 male mice)
- Control animals:
- yes, concurrent vehicle
- Positive control(s):
- Mitomycin C
- Justification for choice of positive control(s): none reported
- Route of administration: oral gavage
- Doses / concentrations: 0.6mg/ml, volume of 20ml/kg/day, dosage of 12mg/kg/day
Examinations
- Tissues and cell types examined:
- Bone marrow/erythtroctes
- Details of tissue and slide preparation:
- CRITERIA FOR DOSE SELECTION:
BPS-MAE was administered once by oral gavage to one group of animals (2 males, 2 females) at 2000 mg/kg/day (the standard limit dose for the micronucleus test). Clinical signs of toxicity included piloerection, underactive behaviour, flattened and hunched posture, fast respiration and abnorma gait.
On the basis of these results 2000 mglkg/day was considered to be the maximum tolerated dose (MTD) in both male and female animals. In line with current guidelines, no substantial difference in toxicity was observed between the sexes, therefore male animals only were used in the main micronucleus test. Dose levels of 500, 1000 and 2000 mg/kg/day were selected.
TREATMENT AND SAMPLING TIMES (in addition to information in specific fields): males from the vehicle control and test substance groups were sacrificed 24 hours after administration of the second dose. In addition males in the positive control group were sacrificed 24 hours after a single dose.
DETAILS OF SLIDE PREPARATION:
The bone marrow of both femurs from each animal was flushed out and pooled in a total volume of 2 ml of pre-filtered foetal calf serum by aspiration. The cells were sedimented by centrifugation, the supernatant was discarded and the cells were resuspended in a small volume of fresh serum. A small drop of the cell suspension was transferred to a glass microscope slide and a smear was prepared in the conventional manner (Schmid 1976). Four smears were made from each animal.
Fixation and staining of slides
1. Fixed for a minimum of 10 minutes in methanol and allowed to air-dry.
2. Rinsed in purified water.
3. Stained in acridine orange solution (0.01 mg/ml using purified water) for 3 minutes.
4. Washed in purified water for 5 minutes.
5. Rinsed in cold tap water for 2 minutes.
6. Stored in the dark at ca 4°C for a minimum of 1 hour until required.
7. Immediately prior to scoring, slides are wet mounted with 50 mm glass coverslips using purified water. - Evaluation criteria:
- One smear from each animal was examined for the presence of micronuclei in 2000 immature erythrocytes. The proportion of immature erythrocytes was assessed by examination of at least 1000 erythrocytes from each animal. A record of the incidence of micronucleated mature erythrocytes was also kept.The following criteria was applied for assessment of assay acceptability:
1. Each treated and control group should include at least 5 analysable animals.
2. Vehicle control values for micronucleated polychromatic erythrocytes must be consistent with the laboratory historical negative control data.
3. Positive controls must show clear unequivocal positive responses.
4. The proportion of immature erythrocytes among total erythrocytes in treated groups is not less than 20% of the control value. - Statistics:
- The results for each treatment group were compared with the results for the vehicle control group using non-parametric statistics.
For incidences of rnicronucleated immature erythrocytes, exact one-sided P-values are calculated by permutation (StatXact, CYTEL Software Corporation, NC, USA). Comparison of several dose levels are made with the vehicle control using the Linear by Linear Association test for trend in a step-down fashion if significance is detected (StatXact, CYTEL Software Corporation, NC, USA); for individual inter-group comparisons (ie the positive control group) this procedure simplifies to a straightforward permutation test (Agresti et al. 1990, Gibbons 1985). For assessment of effects on the proportion of immature erythrocytes, equivalent permutation tests based on rank scores are used, ie exact versions of Wilcoxon's sum of ranks test (Wilcoxon 1945) and lonckheere's test for trend (Jonckheere 1954).
Results and discussion
Test results
- Sex:
- male
- Genotoxicity:
- negative
- Toxicity:
- yes
- Vehicle controls validity:
- valid
- Negative controls validity:
- not applicable
- Positive controls validity:
- valid
- Additional information on results:
- The test substance did not cause any statistically significant increases in the number of micronucleated immature erythrocytes. The test substance did not cause any substantial increases in the incidence of micronucleated mature erythrocytes. The test substance failed to cause any significant decreases in the proportion of immature erythrocytes.
Animals were treated with the test substance at dose levels of 500, 1000 and 2000 mg/kg/day. No clinical signs were noted for the vehicle and positive control group animals over the duration of the test. Animals dosed with BPS-MAE at 500, 1000 and 2000 mg/kg/day showed clinical signs of underactive behaviour, flattened posture, abnormal gait and fast respiration. In addition, one animal in the low treatment group, 500 mg/kg/day, showed overactive behaviour at the terminal observation. All animals survived until scheduled termination. Some incidences of weight loss were recorded but these were small and not considered to be treatment related.
Applicant's summary and conclusion
- Conclusions:
- Interpretation of results (migrated information): negative
BPS-MAE did not show evidence of causing an increase in the induction of micronucleated immature erythrocytes or bone marrow cell toxicity in CD-l mice, when administered orally by gavage in this in vivo test procedure at a dose level of 2000 mg/kg/day.
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